As pointed out by @glassnotes, functions such as q.hadamard currently do not behave well at all when given indices outside the valid range given by the number of qubits. For instance,
>>> print q.hadamard(1, 1)
XI |-> +XI
IX |-> +IZ
ZI |-> +ZI
IZ |-> +IX
>>> print q.phase(1, 3)
X[3] |-> +Y[3]
These should instead raise IndexError exceptions, since there's no sensible meaning to assign to "apply the phase gate to the fourth of one qubits."
As pointed out by @glassnotes, functions such as
q.hadamardcurrently do not behave well at all when given indices outside the valid range given by the number of qubits. For instance,These should instead raise
IndexErrorexceptions, since there's no sensible meaning to assign to "apply the phase gate to the fourth of one qubits."